/*

Value types in C# cannot be null

ie. int, floats, bool etc..

​

why do we need Nullables? when working with database fields that have null values, to map to field in C#

​

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​

​

​

​

*/

​

using System;

public class Program

{

    public static void Main()

    {

        Nullable<int> num = null;

        int numb = num.GetValueOrDefault(); 

        int? numberr = numb;

        int? number = null;

        number = 100; 

        Console.WriteLine(number.HasValue); 

        Console.WriteLine(num.HasValue);

​

        //No Coelescing operator        

        DateTime? date = null;

        DateTime date2 = date ?? DateTime.Today;

        //date2 = (date!=null) ? date.GetValueOrDefault(): DateTime.Today;

        /*

        if(date!=null)

            date2 = date.GetValueOrDefault(); 

        else

            date2 = DateTime.Today;

        */

        Console.WriteLine(date2);

    }

}